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Finding the Fourth Proportional to 722,078.20, 996,483.12 and 395,404.93

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Solution

The fourth proportional to 722,078.20, 996,483.12 and 395,404.93 is: 545,667.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,078.20 : 996,483.12 = 395,404.93 : x
  2. Step 2: Convert to fraction form
    722,078.20/996,483.12 = 395,404.93/x
  3. Step 3: Cross multiply
    722,078.20x = 996,483.12 × 395,404.93
  4. Step 4: Simplify right side
    722,078.20x = 394,014,338,309.78
  5. Step 5: Solve for x
    x = 394,014,338,309.78/722,078.20
  6. Step 6: Final answer
    x = 545,667.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.